90 km/h adhesive disc.Ü 20 mm.In accordance with the highway code, a speed restriction applies to all caravans and campervans with an authorised loaded weight in excess of 3.5 tonnes:- For caravans: 90 km/h on motorways.- 80 Km/h on other open roads.For campervans: - 110 km/h on motorways.- 100km/h on highways.- 80 km/h on otheropen roads.